What is a pyroxenite in geology ?

Pyroxenite : definition

A pyroxenite is a rare metamorphic rock composed mainly of pyroxenes, resulting from the metamorphism of basic rock or calcareous sediment.

It is also a group name used to designate ultrabasic plutonic magmatic rocks made up of more than 60% of one or more pyroxenes, accompanied by olivine, hornblende, biotite and/or phlogopite, which can lead to certain confusions with the term "pyroxenolite" which are normally dedicated to them.

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